Alright, let's work through 87090796 times 86211504 step by step
87090796 × 86211504 = 86211504 × (87090796)
+ 86211504 × 6 giving us 517269024
+ 86211504 × 90 that results in 7759035360
+ 86211504 × 700 what gives us 60348052800
+ 86211504 × 0000 yielding 0
+ 86211504 × 90000 which equals 7759035360000
+ 86211504 × 000000 which equals 0
+ 86211504 × 7000000 producing 603480528000000
+ 86211504 × 80000000 resulting in 6896920320000000

= 7508228507717184
